/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Administrator
 * Date: 2023-03-14
 * Time: 17:01
 */
public class test1 {
    public static void main(String[] args) {
        int sum = 0;
        for (int i = 1; i < 100 ; i ++) {
            if(i % 2 != 0){
                sum += i;
            }
        }
        System.out.println(sum);
    }
}
